HC-SR04 Demo For Arduino

Now, we are pleased to introduce the Ultrasoni modules HC-SR04 to you, which has stable performance and high accuracy , making it a popular module in electronic market. Compared to the Shap IR ranging modules, HC-SR04 is more cost-effective than it , but it has the same accuracy and longer distance.

The HC-SR04 module is easy to use and we has a simple Aruduino demo for the beginning user.

Soon, we will provide another Ultar Sonic Modules SDM-IO, which has faster response and no Blind Area. Stay tuned.

First, it should define two kinds of pins for trigger, 8 for trigger and 9 for echo.

Second, init the trigger signal, you only need to supply a short 10uS pulse to the trigger input to start the ranging, and then the module will send out an 8 cycle burst of ultrasound at 40 kHz and raise its echo.You can calculate the range through the time interval between sending trigger signal and receiving echo signal. the range = high level time * velocity (340M/S) / 2; we suggest to use over 60ms measurement cycle, in order to prevent trigger signal to the echo signal.Then we could Calculating the distance, because we have the pulse width and ues Formula:

There, you can change the trigger pin and echo pin thougth marco define and also use CM or ICN , than you get the distance show as centimeter or inch, we just show you CM demo.OK, now you get the distance in centimeter . It’s very easy , right ?

If you have any question , please send email to us at services@elecfreaks.com

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